6 Mar 11 - Many of the earthquakes were in the
magnitude-3.0 range, but some registered as high as magnitude-4.3, 4.6, 4.8 and
4.9.

See amazing animated map
of Christchurch area showing every earthquake since Sept 4, one by one by one.
(Wait a few
seconds after it loads and you'll see
what I mean.) http://www.christchurchquakemap.co.nz/Thanks to Cam McNaughton for this link